#include <stdio.h>
int *read(void) {
	static int val = 0;
	printf("请输入一个数字：");
	scanf("%d",&val);
	return &val;
}
int main() {
	int *p_val = NULL;
	p_val = read();
	printf("数字是%d\n",*p_val);
	return 0;
}
